From patchwork Wed Jun 10 01:19:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Saravana Kannan X-Patchwork-Id: 199276 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.4 required=3.0 tests=DKIMWL_WL_MED, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20E33C433DF for ; Wed, 10 Jun 2020 01:19:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EDB54206D5 for ; Wed, 10 Jun 2020 01:19:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="eNVqmRIU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725999AbgFJBTn (ORCPT ); Tue, 9 Jun 2020 21:19:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725885AbgFJBTl (ORCPT ); Tue, 9 Jun 2020 21:19:41 -0400 Received: from mail-qk1-x74a.google.com (mail-qk1-x74a.google.com [IPv6:2607:f8b0:4864:20::74a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F8A9C03E96F for ; Tue, 9 Jun 2020 18:19:41 -0700 (PDT) Received: by mail-qk1-x74a.google.com with SMTP id 205so696587qkh.5 for ; Tue, 09 Jun 2020 18:19:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=yfWV0PXIV5PpQ5wJBNut7KX55zaCQiiUSrjbwEbMGQE=; b=eNVqmRIUwneb7C0hIKPK8NbWaIdma8E3pFG9OveH/9rjz2NUiFefJCDfGpjedDR/7Y otq92cPnjrLV3I8b1oYQg5UYASq7FNLE/jasv6gwmUICjes1etn5obIxZOxX4psfSLG3 7ANc8SckSOm6//UdDhSkLFTdZ59wOC508k1w05BoajtFik9GJvQUP7T+jLG7IYPN3oJl 6jSVfbHXGoAReWfJ0+YZPKZImIb901QqJ5VhPf/McBAIQJYpEIj76om28OZJ2fqaEVIC PRT3cY7qmAT+RjXExO5c7+OxN0//N5ZeSMHNI8xfuxkkJhUcBn4jtqKJI3/5/6wWKmKc BAEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=yfWV0PXIV5PpQ5wJBNut7KX55zaCQiiUSrjbwEbMGQE=; b=Q/5bk3czNXSPk3T/jRScOzu7l7HzLfWiwCgNTn8caHXTziLFqXfD+406HtPjri09uu ohoqjaGRz4cfTQx9qL6KHucTmq9dYHtk29EQLWF4u4PdH8ct3TYWG2uLUM0MVT+MyYdC L/voctbmX6etawtmw23tJCuRK66D71s5t/rZ+O5yfuofqM6Cg1ohA5Dlo2Z1mB+acova ZibxGV3ktRppGF30bQ3ESLieSOPv0RikFQivP2BMfEPwgs721o4ePhsItrV14Fjyft/f qappBZncALDCIJqylpr4a413WFdHvxFgQIMtB5M6l0fLnc8gwk3TuiWvoRQza7XjT7iK ibjw== X-Gm-Message-State: AOAM531NQvDdROPgYs//fRCkVl4rSe292THyOvtH3+sB/xRINMWV4lHo Gmo5hTI12eq5sk1UDnHT56A0pNvUJXc2S/4= X-Google-Smtp-Source: ABdhPJxi93+NVDZZ/OsrOpngzLuOz6F85u/dw8RuSapadVdZ0MhksmvrB1L0B0ileeWIo0xXnQsmOhV6vlD0sb0= X-Received: by 2002:ad4:438c:: with SMTP id s12mr973574qvr.200.1591751980646; Tue, 09 Jun 2020 18:19:40 -0700 (PDT) Date: Tue, 9 Jun 2020 18:19:33 -0700 In-Reply-To: <20200610011934.49795-1-saravanak@google.com> Message-Id: <20200610011934.49795-2-saravanak@google.com> Mime-Version: 1.0 References: <20200610011934.49795-1-saravanak@google.com> X-Mailer: git-send-email 2.27.0.278.ge193c7cf3a9-goog Subject: [PATCH v2 1/2] driver core: Add device_is_dependent() to linux/device.h From: Saravana Kannan To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Rob Herring , Frank Rowand Cc: Saravana Kannan , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, John Stultz , kernel-team@android.com Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org DT implementation of fw_devlink needs this function to detect cycles. So make it available. Signed-off-by: Saravana Kannan --- drivers/base/core.c | 2 +- include/linux/device.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index 139cdf7e7327..509b13610b56 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -118,7 +118,7 @@ int device_links_read_lock_held(void) * Check if @target depends on @dev or any device dependent on it (its child or * its consumer etc). Return 1 if that is the case or 0 otherwise. */ -static int device_is_dependent(struct device *dev, void *target) +int device_is_dependent(struct device *dev, void *target) { struct device_link *link; int ret; diff --git a/include/linux/device.h b/include/linux/device.h index ac8e37cd716a..5c618effc51e 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -829,6 +829,7 @@ extern int device_change_owner(struct device *dev, kuid_t kuid, kgid_t kgid); extern const char *device_get_devnode(struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid, const char **tmp); +extern int device_is_dependent(struct device *dev, void *target); static inline bool device_supports_offline(struct device *dev) {